docs: reflect that componentsManifest defaults to true and can be omitted

Co-authored-by: JReinhold <5678122+JReinhold@users.noreply.github.com>

Author: Copilot

.changeset/components-manifest-flag-rename.md

@@ -6,16 +6,3 @@
 Rename feature flag `experimentalComponentsManifest` → `componentsManifest`
 
 The Storybook feature flag has been renamed from `experimentalComponentsManifest` to `componentsManifest` and now defaults to `true` in Storybook core.
-
-The addon is backwards compatible with older Storybook versions that still use the old flag name — it checks `features.componentsManifest` first and falls back to `features.experimentalComponentsManifest`.
-
-**Migration:** Update your `.storybook/main.js` if you had the flag explicitly set:
-
-```js
-// Before
-features: { experimentalComponentsManifest: true }
-
-// After
-features: { componentsManifest: true }
-// Or omit entirely — it defaults to true in recent Storybook versions
-```

.github/instructions/addon-mcp.instructions.md

@@ -31,7 +31,6 @@ The addon supports two toolsets that can be enabled/disabled:
 2. **`docs`** (default: true)
    - `list-all-documentation`: List all available components from manifest
    - `get-documentation`: Get detailed component documentation
-   - Requires feature flag `features.componentsManifest`
 
 **Configuration Methods:**
 

apps/internal-storybook/.storybook/main.ts

@@ -28,9 +28,6 @@ const config = defineMain({
 	core: {
 		disableTelemetry: true,
 	},
-	features: {
-		componentsManifest: true,
-	},
 	// No refs - single source mode
 });
 

eval/templates/grading/.storybook/main.ts

@@ -9,8 +9,5 @@ const config: StorybookConfig = {
 		'@storybook/addon-mcp',
 	],
 	framework: '@storybook/react-vite',
-	features: {
-		componentsManifest: true,
-	},
 };
 export default config;

packages/addon-mcp/README.md

@@ -48,14 +48,12 @@ export default {
 			options: {
 				toolsets: {
 					dev: true, // Tools for story URL retrieval and UI building instructions (default: true)
-					docs: true, // Tools for component manifest and documentation (default: true, requires feature flag below 👇)
+					docs: true, // Tools for component manifest and documentation (default: true)
 				},
 			},
 		},
 	],
-	features: {
-		componentsManifest: true, // Enable manifest generation for the docs toolset, only supported in React-based setups.
-	},
+	// componentsManifest is enabled by default in recent Storybook versions, no need to set it
 };
 ```
 
@@ -180,10 +178,12 @@ These additional tools are available when the component manifest feature is enab
 
 - Storybook version 10.1.0 or higher (currently only available as prereleases, `storybook@next`)
 - React-based framework (`react-vite`, `nextjs-vite`, `nextjs`, `react-webpack5`)
-- Feature flag `features.componentsManifest` set to `true` in `.storybook/main.js`
+- Feature flag `features.componentsManifest` enabled (defaults to `true` in recent Storybook versions)
 
 **To enable:**
 
+The `componentsManifest` feature is enabled by default in recent Storybook versions — no configuration needed. If you need to explicitly set it (e.g. for older Storybook versions), add it to your config:
+
 ```javascript
 // .storybook/main.js
 export default {